Machine-table



.(No Model:) 4Sheets-Sheet 1.

W. H. DUANE & G.W.- BUGBEE.

MACHINE TABLE.

Patented Feb; 13', 1883.

jz n enzfor (No Model.) '4 Sheets-Sheet 2. W; H. DOANE &- G. W. BUGBEE.MACHINE TABLE.

Patented Feb. 13, 1883.

(No Model.) 4 Sheets-Sheet 3.

W. H. DOANE & G. W. BUGBEE.

MACHINE TABLE. No. 272,220.

Patented Fb. 13, 1883.

N. PETERS Pmwumo n her, wmin mn. n.c.

(No Model.) -7 4 Sheets-Sheet 4;

W. H. DOANE & G. W. BUGBEE.

MACHINE TABLE.

N PErcR's Photo-Lithographer. Wnhingbn. DC.

UNITE, STATES ries.

MACHINE-TABLE.

SPECIFICATION forming part of Letters Patent N0.'272,220, dated February13, 1883.

' Application filed June 28,1882. (No model.)

To all whom it may concern Be it known that we, WILLIAM H. DoANE andGEORGE W. BUGBEE, citizens ofthe United States, residing atGincinnati,.in the county of Hamilton and State of Ohio',"have inventedcertain new and useful Improvements in Band Sawing-Machines; and we .dohereby declare the following to be a full, clear, and exact de scriptionof the invention, such as will enable others skilled in the art to'whichit appertains to make and use the same.

This invention relates to bandsaws in general, but more especially tothose which are convertible from hand-feed machines into powerfeed orresaw machines. Heretot'ore separate interchangeable tables wereprovided for these convertible machines, and it was necessary to removeone table and put the other one in its placein the conversion of themachines.

The principal object of this invention is to so construct theseconvertible machines that they may be converted without the removal andsubstitution of separate tables.

To this end it consists mainly in constructin g the work-supportingsurface of two tables divided on a linejust in front of the saw-blade,

constructing the table in front of the sawblade with two faces, (oneplain and the other having power-feed works erected upon it,) and somounting this double-faced or duplex table that it may be reversedwithout dismounting it tobring either of its faces on a line with'thesingle table.

It further consists in so arranging the feed with respect to the gearingfor imparting mounderstood, we have illustrated in the annexeddrawings,'and willproceed to describe, the best roll mechanism. Fig. 3is a rear elevation ofform thereof at present known to us.

Figure 1 is a lront elevation of a'band resawing-machine embodying ourimprovements. Fig. 2 is a side elevation of the tables and feedde'vicesshown in Fig. 2. Fig. 4 is a longitudinal section in elevation ofthereversible duplex table. Fig. 5 is a transverse section on line 0050 5'of Fig. 4. Fig. 6 isa plan of the reversible duplex table. Fig. 7 is anelevation of feed-roll bearing-standard. Fig.8 is a sectional elevationof the feed-gearing driving-shaft. Fig. 9 is a transverse section on theline 3 3 Fig.8. Fig. 10 is a plan of feed-belt tightener. Fig. 11 is aplan of the driven frictional feed disk and gearing. Fig. 12 is asectional plan of the driven frictional feed disk and gears. Fig. 13 isa sectional elevation of device for operating the reversible duplextable. Fig. 14 is a section on line 2 z of Fig. 13. Fig. 15 comprisessectional plan and elevation of means for securing the reversible duplextable in position.

We have illustrated our improvements embodied in a band-saw, theoperative parts of which are mounted on a C-shaped frame, A, the uppersaw-pulley, B, being mounted on the upper horn of the frame, and thelower sawpulley, 0, being keyed to the front end of the main shaft D,supported in suitable hearings on the base of the main fram'e, andcarrying at its rear end a pulley, so that it may be driven by abeltfrom a counter-shaft. The single table E is mounted on the lower horn ofthe main frame, either immovably or in such manner that it may be tiltedto the limited extent for sawing on a bevel. this'table so that it canbe tilted, and to. that end any one of the known modes of connectionproviding for such tilting may be used. The front edge of this singletable projects a little beyond the front face of saw pulley O and thesaw-edge of the saw-blade F, which passes through a suitable slit out insuch edge.

The duplex table consists of two rigidly-connected plates, G and H, andis secured upon the front end of the horizontal shaft I, by which it maybe turned to bring either of its plates on alevel with the single table,E. The

. shaft I passes rearwardly through a long bearing on the lower horn ofthe main frame, underneath the single table, its rear end carrying aforked bearing, 1, on the rear side of the main frame. A worm-gear, I isfeathered on shaft I between the legs of hanger I, by which it is 'heldin posit-ion to properly mesh into and be It is preferred to mountdriven by a worm, K, on a transverse shaft,

K, mountedin stirrup-bearings formed on bearing l, as clearly shown inFig. 14. The wormshalt K is at. its outer end supported in a bracket, Kfixed to table E, and may be turned by a winch or hand-wheel applied toit when the duplex table requires to be reversed. In order that theduplex table may be drawn close against the single table, and alsoseparated therefroma sufficient distance to admit of the removal orapplication of the saw-blade, the shaft lis combined with means formoving itendwise. In this instance said shaft has a hollow tapped rearend, into which is screwed the screw-threaded end of a screw, 1swivt-Ied to a fixed bracket, 1 so that it may be turned, but not movedendwise, by a winch or handwheel. By operating this screw 1 the shaftImay he slid endwise to move the duplex table up against or away from thesingle table, as may be required. In these operations the worm-gearingwill prevent the turning of shaft 1. Thehollow end of shaft 1 isscrew-threaded exterioily, and a nut, 1 is put on it to lock it afterthe duplex table has been drawn up against the single table. Studs 11 t'on bracket t" prevent endwise movement of hanger l and worm-gear l attimes when nttt 1 is run back.

The plate G of the duplex table forms a plain unobstructed surface incontinuation of table E, in connection with which it is used forsupporting work fed to the saw-blade by hand. The plate H, on the otherhand, while its face, when turned up, is also on a level with the singletable, has two sets of upright power feedrollers mounted on the face, asshown. The rollers L and M are jonrnaled in hearings on a standard, Nand the rollers L and M are similarly journaled in bearings on astandard, N The bases of the bearing-standards rest upon the plate H ofthe duplex table, and are respectively secured to slide-bars N and N byvertical stud-pins 11", which can turn in the slide-bars. Consequentlythe bearing-standards may be turned horizontally on the slidebars toeffect parallelism of the rollers. This horizontal turning of thebearing-standards is effected by the adjustment of center screws, n,screwed in lugs on the base of each standard, and bearing againstopposite sides of the upturned ends of the slide-bars. When properlyadjusted horizontally the bearing-standards may be secured by bolts 11The slide-bars are fitted in slots in plate H to move in directionsacross the edge of the saw-blade, so that the rollers may be properlyadjusted with respect thereto and the stufl' to be resawed. A screw, or,swiveled to a log on plate H, is applied to the nut in the upturned endof slide-bar N for adjusting it, and a screw, it, is applied toslide-bar N for the same purpose. it", is placed on screw it, between acollar the: eon and its supporting-lug, so that the bearingstandard N, uit it its rollers, may yield to some extent to accommodate inequalitiesin the thickness of the stufi' led to the saw. The lower journals of thefeed-rollers are provided heneath plate H with spur-wheels l and m and land m, respectively. The spur-wheels l and A spring,

in are driven by a spur-wheel, o, secured to a bevel-wheel, 0 whichturns loosely on the stud n of slide-bar N. The spur-wheels l and m aredriven by a spur-wheel, 19, secured to a bevel-wheeh fi, which turnsloosely on the stud n of slide-bar N. Bevel-wheel o is driven by abevel-wheel, 0", on horizontal feed-shaft Q, and bevel-wheel p is drivenby bevel-wheel p on said feed-shaft 0, which turns in bearings on theduplex table. The bevel-wheels 0 and p are feathered to shaft 0," sothat they may he slid thereon. A fixed artn, 0, projecting frotn frameN, engages a circular groove in the hub of bevel-wheel 0 ,and a similarfixed arm, 12', projecting from frame N, engages a circular groove inthe hub of bevel-wheel 19 Thus the bevel-wheels o and 19" are compelledto slide with the fraineN and N, so that they will always properly meshwith the bevelwheels 0 and p That end of the feed-shaft O which is theright-hand end when the plate H of the duplex table is turned up on alevel with the single table carries on its overhung end a spur-wheel, 0,adapted to be engaged and driven by a pinion, P journaled on a stud, P,on the end of one arm of an elbowlever, P, which is pivoted on ahorizontal shaft, P. Pinion P forms part of or is secured to spur-wheelP, which meshes with and is driven by a pinion, P keyed to africtiondisk, P, on shaft P. Shaft P is supported in a hanger, Psuspended from the under side of thesingle table E, and has keyed to itsinner end a friction-disk, P, adapted to be driven by a friction-driver,R, on a shaft, R, supported by hangers R and R from table E. The outerend of shaft P is clutched by the hooked end of the short arm ofa lever,Pf, tulcrumed on a bracket on elbow-lever P in such I manner that suchlever P may be turned horizontal, in order to slide shaft P for thepurpose of forcing its friction-disk P up against or moving it away fromthe friction-driver it, according as the teed-gearing is to be in motlonor at rest. Ascrew,p tnrningin a not on the lever B, and adapted to bearwith its foot against elbow-lever P, may he used to hold thetriction-disk P in driving frictional contact with friction-driver B.When elbow-lever P is turned to a position in which pinion P canproperly mesh into spur-wheel 0 one of its arms hooks onto aclamping-screw, P, by

which it may be firmly clamped to the edge of I the single table E. Onrel asing it from the clamping-screw P the elbow-lever, together withits wheels P P and lever P may be turned down so as to disengage thespurwheel 0, so that the way may be cleared for the reversal oftheduplex table. Shaft R cairies a pulley, R in order that it may bedriven by a belt, H from a pulley. It, on main shaft D. The slack sideof belt R is combined with a weighted belt-tightener, R pivoted to abracket-arm on the under side of table E. In order that the speed of thefeed-gearing may be changed to suit circumstances. the shaft R is soarranged that it may he slid endwise to friction-disk P.

move the frictiondriver B across the face of To this end the hanger R ofthe shaft is fitted in ways on t-he'under side of table E, so that suchhanger may he slid horizontally to move the shaft endwise. The otherhanger, R is fixed, and supports the shouldered hub of pulley R to whichthe shaft is feathered, so that it may slide in it. The shaft isprovided with a collar on each side of hanger It, so that it must movewith the latter. The hanger R is connected to a lever, B", fulcrumed at1 on table E. Theouter end of lever B is connected to a rod, R whichshould reach to the front ,of the machine, in order that it may beconvenientlyoperated by the sawyer. We do not herein claim thisparticular combination of parts for shifting the movable shaft endwise,but reserve the right to claim it llBIktlflEIlll a separate patent.

The single table E is provided with a horizontally-turning latch, S, inits edge, to engage a slit in one end or the other of the duplex tableand lock the two tables together after they have been brought to thesame level.

Since the single table E turns upon a center different from the axis ofthe shaft I of the duplex table, it is necessa ry to provide some meansto compensate the difference in the planes assumed by the respectivetables when turned on their centers for bevel-sawing. This is providedfor in this instance by mounting the duplex table upon the eccentricportion 2" of shaft- 1 by turning the duplex table on which suchdifierences may be compensated. When properly adjusted on such eccentricthe duplex table is secured to it by a set-screw, 1 which is providedwith a suitable handle for convenience of operation.

Primarily the invention is notlimited to the particular means ofsupporting and reversing the duplex table. These means may be greatlyvaried without changing the essential character of this part of theinvention. The mechanism or train for imparting motion to the feed-shaftand train for operating the feedroller, as well sas the feed mechanismproper, may also be greatly varied without departing from this generalfeature of the improved resaw-namely, that the power-feed of the duplextable is thrown out of gear by turning said table to bring its plainplate on a level with the single table, and is thrown into position tobe driven on turning the duplex table to bring its plate carrying thefeed-rollers on a level with the single table. The movement of theduplex table toward and away from the single table may be eff cted bysliding the duplex table on its supporting-shaft, either by hand or bymechanism, suitable changes be ing made in the construction. Parts ofthe invention may be used without other partsthereof, and some of thenovel features may be incorporated in machines other than bandsaws.

Having thus described our invention, what we claim is-- 1. Thecombination, substantially as before set forth, with awoodworking-machine frame,

of the single table supported thereon and the versible duplex tablecarrying a feed mechanism on one of its faces, and the shaft forsupporting and adapted to reverse said duplex table.

3. The combination,substantially as before set forth, with awoodworking-machine frame, of the single table supported thereon, andthe duplex table, which is both reversible and movable toward and awayfrom the single table, and also carries afeed mechanism on one of itsfaces.

4. The combination, substantially as before set forth, with awoodworking-machine frame, of the single table supported thereon, thereversible duplex table carrying a feed mechanism on one of its faces,the shaft for supporting and reversing said duplex table, and the screwfor sliding the shaft.

5. The combination, substantially as before set forth, of the reversibleduplex table, the feed-rollers mounted on the face of one of the twoplates of said table,and the feed-shaft and train for driving saidfeed-rollers, arranged between the plates of the table. I

6. The combination, substantially as before set forth, of the reversibleduplex table and a power-feed mechanism mounted thereon, the

driven pinion 0 of which is located, as described, so that it is thrownout of gear and into positionv to be driven, according as one face orthe other of said duplex table is turned 7. The combination,substantially as before set forth, of the reversible duplex table, a power-feed mechanism mounted thereon, a gearing or train for impartingmotion to the feedshaft thereof, and a lever or hinged arm forsupporting part of said train, and pivoted at a point distant from thefeed-shaft, so that by moving said lever or arm the train may bedisengaged from or engaged with said feed-shaft.

8. The combination, substantially as before set forth, of the reversibleduplex table carrying a feed mechanism on one of its'faces, the shaftsupporting it, and the worm-gearing for turning said shaft.

9. The combination, substantially as before set forth, with awoodworking-machine frame and the single table supported thereon, of thereversible duplex table carrying a feed meohauism on one of its faces,the endwise movable shaft 1, the forked hanger thereon for supportingone end of the worm-shaft, and the worm-gear feathered to shaft 1between the forks of said hanger.

10. The combination,substantially as before set forth, with awoodworking-machine frame and the single table supported thereon, of thereversible duplex table carrying a feed mechanism on one ofits faces,the shaft 1, the forked hanger thereon for supporting one end of theturned, and carryiuga feed mechanism on one worm-shaft and confining theworm-gear, the of its faces.

screw for moving shaft 1 endwise, and the In testimony whereofweafiixour signatures fixed bracket supporting the screw and bearinpresence of two witnesses.

5 lug against one side of the hanger. T

11. The combination, substantially as before FE set forth, with awoodworking-machine frame J and the single table supported thereon, ot'the Witnesses:

reversible duplex table mounted and adjusta- SIMEON HARRIS, 10 Die on aneccentric of the shaft, by which it is l A. O. BLAKEMORE.

